EP2703264A1 - Générateur de courant de Foucault pour bicyclettes - Google Patents

Générateur de courant de Foucault pour bicyclettes Download PDF

Info

Publication number
EP2703264A1
EP2703264A1 EP20130182031 EP13182031A EP2703264A1 EP 2703264 A1 EP2703264 A1 EP 2703264A1 EP 20130182031 EP20130182031 EP 20130182031 EP 13182031 A EP13182031 A EP 13182031A EP 2703264 A1 EP2703264 A1 EP 2703264A1
Authority
EP
European Patent Office
Prior art keywords
generator
magnet
bicycle
coil
magnet part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20130182031
Other languages
German (de)
English (en)
Inventor
Kenneth Linnebjerg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
REELIGHT APS
Original Assignee
REELIGHT APS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by REELIGHT APS filed Critical REELIGHT APS
Priority to EP20130182031 priority Critical patent/EP2703264A1/fr
Publication of EP2703264A1 publication Critical patent/EP2703264A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1869—Linear generators; sectional generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1846—Rotary generators structurally associated with wheels or associated parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
    • B62J6/06—Arrangement of lighting dynamos or drives therefor
    • B62J6/08—Tyre drives

Definitions

  • the invention relates to electrical induction generators, in particular to electrical induction generators for bicycles.
  • WO0133700 discloses an electricity generating device for a vehicle comprising at least a first and a second part that is moveable in relation to each other.
  • the electricity generating device comprises at least one coil being attached to the first part, and the coil comprises a core, layers of windings and a first and a second electrical output to which light emitting means may be connected.
  • One or more first magnets are attached to said first part for creating a magnetic flux through the coil, and one or more metallic elements are attached to said second part.
  • a current may be induced in the coil when the size of the magnetic flux passing through the coil is changed by moving the second part in relation to the first part, or vice versa, so that the metallic elements pass said first magnet(s).
  • EP2178738 discloses a generator for a bicycle.
  • the generator has a driving magnet fixed to a wheel of the bicycle and an induction structure which is fixed to the frame of the bicycle.
  • the induction structure comprises an induction magnet which is movably fixed to a coil.
  • a fixture allows fixing of the magnets at locations where they, during normal operation of the bicycle, repeatedly moves towards and away from each other so that the driving magnet moves the induction magnet relative to the coil.
  • the generator further comprises a resetting magnet which provides positioning of the induction magnet relative to the coil when the driving magnet moves away from the induction magnet.
  • a generator for a bicycle that comprises:
  • the generator is configured so that it advantageously exploits the presence of an electrically conducting moveable part of the bicycle, e.g. the rim, for generation of electric current.
  • the electrically conducting moveable part serves two functions: A primary function and a secondary function, where the primary function is different from the secondary function being the guiding of the part of the magnetic field.
  • the generator may be made simpler and more compact since the electrically conducting part is not part of the generator but is part of the bicycle.
  • mounting of the generator may be simpler than other bicycle generators since only one part need to be fixed to the bicycle since the electrically conducting part is already present.
  • the magnet part may comprise one or more permanent magnetic north poles and one or more permanent magnetic south poles.
  • the electrically conducting moveable part is ring or disc shaped and configured so that when the moveable part moves relative to the magnet part the moveable part will always guide a part of the magnetic field independent of the position of the moveable part.
  • the electrically conducting moveable part may have a structure which is unbroken along a circular path, eddy currents will be generated continuously in time as long as the electrically conducting moveable part moves and, therefore, the generator will be able to generate an AC current which is continuous in time, i.e. periods where no current is generated will not (or substantially not) be present as long as the electrically conducting moveable part moves.
  • the electrically conducting moveable part may be a rim of a wheel of the bicycle or a disc of a brake disc attachable to the wheel of the bicycle.
  • the brake disc since such a disc enables the magnet part to be fixed with a small axial distance from the brake disc since such a disc normally is manufactured with low tolerances so that the disc does not fluctuate much in the axial direction.
  • the small axial distance may enable generation of higher electrical currents since magnetic losses in the air gap between the magnet part and the electrically conducting moveable part are minimized.
  • the rim of a wheel since the large diameter of the rim generates a high motion speed of the electrically conducting moveable part. The power generated by the generator tends to increase with increasing motion speed of the electrically conducting moveable part - at least as long as hysteresis losses in magnetically conducting material are not significant.
  • the magnet part is rotatably fixed relative to the coil by a fixed rotation axis so that the magnetic field generated by the eddy currents will interact with the magnetic north and south poles in such a way that the magnet part is forced to rotate when the movable part moves.
  • the generator may be configured in a housing to which the coil is fixed and the magnet part is rotatably fixed - so that the magnet part is rotatably fixed relative to the coil.
  • the housing may comprise an opening through which the movable part may protrude so that it can interact with the electrically conducting part.
  • the generator may be configured so that the housing provides a watertight enclosure for the coil and magnet part - in this case the magnet part may interact with the electrically conducting part via a part, e.g. a shell, of the housing which may be made so thin, e.g. 0.5 mm thick, so that magnetic losses in the shell are insignificant or substantially insignificant.
  • a part e.g. a shell
  • the housing which may be made so thin, e.g. 0.5 mm thick, so that magnetic losses in the shell are insignificant or substantially insignificant.
  • the generator comprises an element of magnetically conducting material arranged to guide the magnetic field between the north and south poles of the magnet part, where the winding of the coil are wound around a part of the element of magnetically conductive material.
  • the winding of the coil is wound directly around the magnet part so that the magnetic field is only guided by air from the magnet part to the coil.
  • magnetically conducting material may not be used and, therefore, this embodiment may be particularly advantageous for configurations of the generator where the magnet part moves with a high speed, e.g. wherein rotatable magnet parts with a small diameter are utilized. That is, magnet parts that move with a high speed tend to generate magnetic hysteresis losses in the magnetically conducting material and, therefore, air guidance of the magnetic field between the magnet part and the coil (i.e. a coil with a core of air) may be advantageous for optimizing the electrical energy production.
  • the generator comprises first and second magnet parts rotatably fixed relative to the coil by respective first and second fixed rotation axes.
  • the generation of variations in the magnetic field from the magnet part may advantageously be distributed among a plurality of magnet parts.
  • each of the magnet parts may be made smaller than a corresponding single magnet part.
  • a single magnet part with a weight A of the magnetic material may be substituted by two smaller magnet parts each with a weight A/2 or less while maintaining the same electrical power production capability.
  • smaller magnet parts may facilitate specific shaping of the generator since the plurality of magnet parts may be located as needed.
  • the magnet parts may be located so that the shape of the generator can be integrated or combined with a brake pad or brake shoe for a bicycle brake.
  • the coil is arranged between the first and second magnet parts.
  • the coil may experience enlarged magnetic field variations.
  • the generator comprises an element of magnetically conducting material arranged to guide the magnetic field between a pole of the first magnetic part and a pole (possibly of opposite magnetic polarity) of the second magnetic part, where the winding of the coil are wound around a part of the magnetically conducting material.
  • the element of magnetically conducting material is U-shaped or E-shaped
  • the U-shaped or E- magnetically conducting material is U-shaped or E-shaped element comprises at least two legs and a connector connecting the two legs, where the U-shaped or E-shaped element is arranged to guide the magnetic field from the first magnetic part via one of the legs to the second magnetic part via the other leg or one of the remaining legs, and where:
  • the coil may advantageously be located remote from moveable part which may be useful for particular designs of the generator.
  • the generator may be configured so that the magnet part has a minimum distance of 1 to 5 mm to the moving part, and so that the magnet part has a minimum distance of 0.3 to 0.8 mm to the magnetically conducting material.
  • the distance between the magnet part and the moving part may be selected to be larger than the distance between the magnet part and the magnetically conducting material.
  • a second aspect of the invention relates to a bicycle light, comprising
  • the light source is integrated with the generator in a common housing and the bicycle light is configured so that at least a part of the light from the light source is able to illuminate a wheel component.
  • the generator is located adjacent to the rim, illumination of the rim is easily obtainable since the light source may be configured to direct at least a part of the generated light towards the rim or tire.
  • the illumination of the rim may provide decorative light effects and/or additional safety/visibility.
  • a third aspect of the invention relates to a generator system comprising:
  • a fifth aspect of the invention relates to a bicycle or bicycle part, comprising,
  • a sixth aspect of the invention relates to a method for producing electric power on a bicycle wherein the method comprises
  • the invention relates to an electrical generator for bicycles and similar vehicles.
  • the generator includes a moveable magnet part which will generate an induction current in a coil when the magnet part moves.
  • the generator is configured to be mounted near an electrical conducting part of the bicycle.
  • the electrical conducting part e.g. a rim, is rotatably arranged with the bicycle.
  • the electrical conducting part rotates the magnetic field from the magnet part will generate eddy currents in the electrical conducting part.
  • the eddy currents will generate a magnetic field which will force the magnet part to move, e.g. rotate.
  • an electrical current will be generated in the coil when the electrical conducting part rotates.
  • Fig. 1a shows an embodiment of a generator 100 for a bicycle.
  • the generator is capable of generating electric current for powering various electrical consumers of the bicycle, e.g. one or more lights, a bicycle computer and/or a charger or powering unit for digital equipment such as a mobile computer or mobile phone.
  • the generator 100 comprises a coil 101 of electrically conducting wire which is configured to supply current generated in the coil to an electrical consumer or power storage electronics.
  • the generator 100 further comprises a magnet part 102 comprising at least one permanent magnetic north pole N, 102a and at least one permanent magnetic south pole S, 102b.
  • the poles generate a magnetic field 111 directed form the north pole to the south pole.
  • the magnet part 102 is moveably arranged relative to the coil.
  • the magnet part 102 is rotatably fixed relative to the coil 101 via a fixed hinge axis 104.
  • the coil 101 is arranged relative to the magnet part 102 so that the coil is able to generate an electric current when exposed to a change in the magnetic field 111 from the magnet part 102.
  • the changes in the magnetic field from the magnet part 102 are generated when the magnet part 102 moves, e.g. rotates.
  • the magnet part 102 is configured for mounting adjacent to an electrically conducting moveable part 120 of the bicycle so that the movable part 120 is able to guide a part of the magnetic field 111 from the magnet part 102.
  • the movable part 120 may be made of non-ferromagnetic material (e.g. carbon fiber or aluminum) or ferromagnetic material (e.g. iron or some types of steel).
  • the movable part 120 may be the rim of a wheel of the bicycle, a brake disc of a bicycle disc-brake or other ring or disc shaped structure being part of the bicycle or connectable with the bicycle. Like the rim or brake disc, the movable part 120 rotates around a rotation axis 121 when the bicycle is operated, i.e. when the cyclist drives the bicycle, so that the moveable part moves in direction 122 relative to the magnet part 102.
  • the moveable part 120 may have a continuous or unbroken (or substantially continuous or unbroken) structure so that - when the magnet part 102 is mounted on the bicycle adjacent to the moveable part 120 - the moveable part 120 will always be able to guide a part of the magnetic field 111 independent of the position of the moveable part. Even though e.g. a rim may be discontinuous at a connection point or a brake-disc may have ventilation holes, the moveable part may both be able to guide the magnetic field or part of the field continuously in time as the bicycle is operated and to guide the magnetic field 111 between the poles of the magnet part 102 independent of the position of the moveable part.
  • the electrically conducting moveable part 120 may be a part of the bicycle (e.g. a rim or disc of a disc-brake connectable with the bicycle) which primary purpose/function is different than a secondary purpose/function which is the guiding of the part of the magnetic field 111.
  • the primary function of the rim is to provide a wheel
  • the secondary function of the rim is to act as a part of the generator 100 by providing a magnetic pathway between the magnetic poles of the magnet part 102.
  • eddy currents 151 are generated in the moveable part.
  • the eddy currents flow in circular patterns within the electrical conductive material of the moveable part.
  • the eddy currents will generate a magnetic field 152 which will interact with the magnetic north and south poles 102a, 102b of the magnet part 102 in such a way that the magnet part is forced to move, e.g. to rotate in direction 105.
  • the direction of the eddy current can be determined according to Lenz's law. That is, the eddy currents 151 will have a direction so that the magnetic field 152 opposes the change of magnetic field 111 which generates the eddy current.
  • the magnetic field 111 in the moveable part 120 will continuously change as new un-magnetized material becomes magnetized by the magnetic field 111. Accordingly, an opposing magnetic field 152 is continuously generated so that the magnet part 102 is continuously driven to rotate. That is, since the magnet part 102 continuously moves, the magnetic fields 111, 152 will continuously change direction and amplitude and the continuous change of the magnetic fields 111, 152 are able to continuously drive the magnet part 102. In turn, the strength and direction of the magnetic field 111 extending from the north pole 102a to the south pole 102b will vary and generate electromagnetic induction in the coil 101.
  • the rotation direction 105 of the magnet part 102 is given by the direction of movement 122 of the moveable part 120.
  • Eddy currents 151 will be generated which have a direction to generate a magnetic field 152 having a direction for opposing the change of magnetic field 111 which generated the eddy current. Therefore, the eddy current will generate a north pole N' which attracts the south pole S, 102b in an attempt to stop rotation of the magnet part 102.
  • the magnet part 102 will be forced to rotate clockwise in direction 105 due to the attraction between the south pole of the magnet part 102 and the north pole of the moveable part 120.
  • Fig. 1a the rotation axis 104 of the magnet part 102 is perpendicular or substantially perpendicular to the rotation direction 121 and parallel or substantially parallel with the radial direction of the circular or disc shaped moveable part 120.
  • Fig. 1b shows an embodiment where the rotation axis 104 of the magnet part 102 is perpendicular or substantially perpendicular to the rotation direction 121 and perpendicular or substantially perpendicular with the radial direction of the circular or disc shaped moveable part 120.
  • Fig. 1c shows an embodiment where the rotation axis 104 of the magnet part 102 is parallel or substantially parallel to the rotation direction 121 and perpendicular or substantially perpendicular with the radial direction of the circular or disc shaped moveable part 120.
  • a generator with any of the orientations of the magnet part 102 in Figs. 1a-1c is capable of generating electric current.
  • the element 301 of magnetically conducting material may be U-shaped, where the U-shaped element comprises two legs 302, 304 and a connector 303 connecting the two legs.
  • the winding of the coil 101 may be wound around the connector or around one of the legs.
  • the generator 100 comprises two or more coils. For example, a first coil may be wound around a first leg 302 and a second coil may be wound around a second leg 304.
  • the coils may be coupled in series or in parallel.
  • the generators 100 in Figs. 1a-c may be configured with two or more coils.
  • the generator in Fig. 1a may be provided with a coil above the magnet part 102 (as shown in the plane of the paper), and/or with a coil below the magnet part 102, and/or with a magnet part 102 to the left of the magnet part 102.
  • a coil above the magnet part 102 as shown in the plane of the paper
  • a coil below the magnet part 102 and/or with a magnet part 102 to the left of the magnet part 102.
  • To possibility to use one or more coils in a generator 100 configured with one or more magnet parts applies to any embodiment described herein.
  • the use of a plurality of coils may enable generation of more electrical power since variations in the magnetic field from the magnet part 102 may be utilized more efficiently.
  • Fig. 3b shows an embodiment of the generator 100 where the winding of the coil 101 are wound around the magnet part.
  • the coil may be arranged close to the magnet part 102 to avoid or minimize magnetic losses and to achieve a compact design.
  • the embodiment of Fig. 3b is characterized in that the magnetic field from the magnetic poles of the magnet part 102 is guided by air to the coil 101.
  • the generator 100 in Fig. 3b may also be configured with two or more coils.
  • a second coil 101 may be wound around the magnet part at an angle to the first coil.
  • Fig. 4 shows an embodiment of the generator 100 which comprises first and second magnet parts 402, 403 which are rotatably fixed relative to the coil 101 by respective first and second fixed rotation axes 404, 405.
  • the first and second magnet parts 402, 403 are arranged adjacent to the movable part 120 so that eddy currents are generated at first and second locations 421, 422 in the moveable part adjacent to the respective first and second magnet parts 402, 403 when the moveable part moves relative to the magnet parts.
  • the eddy currents at the first and second locations 421, 422 caused by the magnetic fields 111 and motion of the moveable part generate magnetic fields corresponding to the principle described earlier in connection with Fig. 1a .
  • the magnetic fields from the eddy currents at the first and second locations 421, 422 will interact with the respective first and second magnet parts 402, 403 in such a way that the magnet parts are forced to rotate.
  • the generator 100 may be configured so that the first and second magnet parts 402, 403 can be arranged adjacent to the moveable part.
  • the first and second magnet parts 402, 403 may be positioned along a circular direction along a part of the moveable part, e.g. along a part of the rim or along a circular direction of a disc brake.
  • the first and second magnet parts 402, 403 could be positioned along a radial direction, e.g. of a brake disc.
  • the first and second magnet parts will rotate in a synchronized manner so that a pole 402a, 402b of the first magnet part will face a pole 403a, 403b of opposite magnetic polarity when poles are adjacent.
  • the configuration of the generator 100 in Fig. 4 may additionally be provided with one or more additional coils, e.g. located to the left of the magnet parts (in the illustrated plane).
  • the coil 101 may be arranged between the first and second magnet parts 402, 403 so that at some point in time when the first and second magnet parts 402, 403 rotate due to interaction with the magnetic fields generated by the eddy currents, the north pole N,402a of the first magnet 402 will face one end of the coil and the south pole S,403b of the second magnet 403 will face the other end of the coil.
  • the ends of the coil correspond to the poles of the coil.
  • the first and second magnet parts 402,403 are separated by a minimum distance 481 between facing poles, and the first and second magnet parts are separated from the movable part 120 by a minimum distance 482.
  • the first and second magnet parts 402,403 may be separated by the distance 481 so that a braking torque exerted by the first magnet part 402 on the second magnet part 403 is lower - e.g. 5-30 percent lower - than the driving torque exerted by the magnetic fields from the eddy currents on the first or second magnet part 402,403.
  • the ratio of distances 481,482 depends on the magnetic strength of the magnetic poles of the magnet parts 402,403.
  • the distance 482 may be in the range of 1-5 mm and the distance 481 may be in the range of 3-10 mm.
  • the minimum distance 481 between poles should be larger than the minimum distance 482 between poles and the moving part 120 - however depending on the magnetic strength of the magnet part 402, 403.
  • the generator 100 comprises an element 401 of magnetically conducting material arranged to guide the magnetic field between a pole 402a, 402b of the first magnetic part 402 and a pole 403a,403b of the second magnetic part 403 where the winding of the coil are wound around a part of the magnetically conduction material so the magnetic field passes through the coil.
  • Fig. 5A shows an embodiment of the generator 100 which comprises first and second magnetic parts 402, 403 and a U-shaped element of magnetically conducting material 501.
  • the U-shaped element comprises two legs (511, 512), each one of them projecting towards one of the magnet parts 402, 403 and a connector (513) connecting the two legs.
  • the U-shaped element 501 is arranged to guide the magnetic field from the first magnetic part 402 via one of the legs and the connector to the second magnetic part 403 via the other leg.
  • the winding of the coil 101 may be wound around the connector or one of the legs.
  • a first coil may be wound around one of the legs and a second coil may be wound around the other leg.
  • the first and second coils may be connected in series or in parallel.
  • Fig. 5B shows an example of a generator 100 which comprises a first, a second and a third magnetic part 402, 403, 512 and an E-shaped element of magnetically conducting material 502.
  • the E-shaped element comprises three legs (521-523), each one of them projecting towards one of the magnet parts 402, 403, 512 and a connector (524) magnetically connecting the three legs.
  • the E-shaped element 502 is arranged to guide the magnetic field from the first magnetic part 402 via one of the legs and the connector to the second magnetic part 403 and the third magnetic part 512 via the other two legs.
  • a single coil 101 may be wound around the connector or one of the legs.
  • a first coil 503 may be wound around a part of the connector at a location between first and second legs and a second coil 504 may be wound around at different part of the connector at a location between the second and third legs.
  • the first and second coils may be connected as described in connection with Fig. 5a .
  • the principles of the embodiments of comprising two or more magnetic parts as described in connection with Fig. 4 , Fig. 5a and Fig. 5b may also be utilized with the generator embodiment of Fig. 2 using a linearly displaceable magnet part 102.
  • the generator may comprise two or more linearly displaceable or rotatable magnet parts with or without magnetically conducting structures for guiding the magnetic fields between magnet parts.
  • the minimum separation 583 between the magnet part 102, 202, 402, 403, 512 and the magnetically conducting element 301, 401, 501, 502 may be between 0.3 and 0.8 mm, and the minimum separation between the magnet part 102, 202, 402, 403, 512 and the moveable part 120 may be between 1 and 5 mm.
  • the term "minimum separation" in relation to distances 481, 482, 582, 583 refers to the minimum measureable distance between two structures.
  • the rotatable magnet part 102, 402, 403, 512 of any of the embodiments of the generator 100 may comprise two or more poles.
  • Fig. 6A shows an example of a rotatable magnet part 601 comprising three north poles and three south poles.
  • Fig. 6A shows that the rotatable magnet part 601 has a circular outer circumference (in a plane perpendicular to the rotation axis 104) and that each of the magnetic poles, i.e. magnets, in the magnet part 601 are rounded along the outer circumference of the magnet part 601 so as to form the circular outer circumference of the magnet part 601.
  • Fig. 6A also shows that the rounding-radius of the individual magnets is equal or substantially equal to the radius of the circular outer circumference of the magnet part 601.
  • Fig. 6A also shows that the rounding-radius of the individual magnet parts is constant or substantially constant along the outer arc of the individual magnet part.
  • the circular outer circumference has the effect that the distance between the circular outer circumference and the electrically conducting moveable part 120 is constant or substantially constant, in operation of the generator 100, irrespective of the angular position of the magnet part 601.
  • Fig. 6A further shows that the rotatable magnet part 601 is constructed from adjoining individual magnets, i.e. the magnetic poles or magnets in the magnet part 601 are located adjacent to each other.
  • Fig. 6A there is no separation or substantially no separation between two adjoining magnets. That is, the distance from a surface of one the magnets to a surface of an adjoining magnet (of opposite magnetic polarity) is zero or substantially zero.
  • a thin layer of adhesive may be present between the surfaces of adjoining magnets so that the distance between surfaces is not exactly zero due to the layer of adhesive.
  • Fig. 6B shows a practical embodiment of a rotatable magnet part 602 which is made from a plurality of magnets 603 comprising a north pole 611 and a south pole 612, a body 604 and an axis 104.
  • the body 604 may be made of non-magnetically conducting material such as plastic or preferably from a magnetically conducting material.
  • the magnets 603 may be fixed to the body 604 by inserting them into holes in the body 601 or by embedding the magnets 603 in the body 604.
  • the embodiment in Fig. 6A does not contain a body to which the magnets 603 are fixed or attached.
  • the rotatable magnet part 601 in Fig. 6A is configured from individual magnets attached to each other, e.g. by connecting adjoining magnets by use only of an adhesive, so that the connected magnets forms a magnet part 601 which is self-supported, i.e. which does not require other supporting structures for holding the magnets in place (except possibly of adhesive applied between magnets).
  • Fig. 6A shows that the magnet part 601 may be configured with a hole in the center for supporting an axis 104.
  • the magnet part may have a number of individual magnets equal to an integer multiple of two, e.g. 2, 4, 6, 8 or more magnets.
  • Each pole in the magnet part e.g. a pole S, is in the form of a magnet having a south and a north pole. For convenience, only the outermost pole is illustrated in Fig. 6a .
  • a magnetic north pole N is arranged opposite, i.e. at an angle of 180 degrees, to a magnetic south pole.
  • the rotation axis 104 is arranged so that it extends between the poles and preferably in the center of the rotatable magnet part 102, 402, 403, 512, 601, 602.
  • Fig. 7 illustrates a bicycle 701 (here only the fork and front wheel of the bicycle is shown for convenience).
  • the bicycle 701 comprises the generator 100 and the moving part 120, here the moving part is the rim 703 of a wheel 702.
  • the generator 100 may be specifically designed to be attachable to a bicycle part, e.g. the fork 704 so that the magnet part 102 of the generator 100 is located adjacent to the electrically conducting part of the moving part 120 and with a given separation 582 as illustrated in the front view in the bottom part of Fig. 7 .
  • the generator 100 may be part of a generator system 711 which comprises the generator 100 and a fixation 705 (see Fig. 7 ) for fixing the generator so that the magnet part 102 is located adjacent the moving part when fixated. Accordingly, the fixation may be specifically designed to obtain a correct location and fixation of the one or more magnet parts 102 relative to the movable part 120.
  • the attachable generator 100 may be sold as a bicycle generator 100 or bicycle generator system 711 which has to be mounted in a specific way by the user in order to function properly since the function of the generator 100 depends on correct mounting relative to the moveable part 120 of the bicycle 701.
  • the generator 100 may be sold together with mounting instructions telling the user how to mount the generator relative to the movable part 120.
  • the generator 100 may be sold together with a bicycle 701 or bicycle part (e.g. a fork 704 with an associated wheel 702).
  • a bicycle shop or merchant may sell a bicycle having a mountable generator 100 mounted to the bicycle.
  • the generator may be integrated with a part of the bicycle 701; for example, the generator 100 may be integrated into the fork 704 so that only a minor part of the generator 100 protrudes outside the fork.
  • Fig. 7 illustrates a brake disc 720 which can be used as an electrically conducting moveable part 120 for the generator 100.
  • the generator 100 and brake shoe and brake mechanism is not shown in Fig. 7 in combination with the brake disc 720.
  • the generator 100 may be integrated with a bicycle part being a brake shoe.
  • Fig. 8 shows an example of a brake shoe 800 comprising the generator 100, a brake material or brake pad 801 and a fixation means 802 for fixing the brake shoe to a bicycle brake such as a rim brake (V-brake or cantilever brake) or disc brake.
  • the brake shoe 800 may additionally comprise a light source connected with the coil of the generator 100.
  • the brake shoe 800 may be configured as a generator 100 which is connectable with a brake shoe via a connector 803.
  • the generator 100 may be connected to a brake shoe as an extension.
  • the brake shoe 800 may be configured so that the generator 100 is integrated with a brake shoe to form a single unit, e.g. by fixing both the brake material 801 and the generator to a single support 804.
  • the brake shoe 800 may be configured with an adjusting means capable of adjusting the distance 805 between the braking surface of the brake material 801 and the surface part of the generator which is intended to face the moving part 120. Thereby the distance 582 between the generator and the moveable part 120 may be adjusted as the brake material 801 is worn.
  • the generator 100 may be configured as a bicycle light comprising the generator 100 and a light source such as a LED and possibly associated electrics for adapting the power output from the coil 101 to the required input electrical specifications of the light source, e.g. voltage specifications.
  • a light source such as a LED and possibly associated electrics for adapting the power output from the coil 101 to the required input electrical specifications of the light source, e.g. voltage specifications.
  • the light source may be integrated with the generator 100 in a common housing to form the bicycle light 706 as a single unit.
  • the bicycle light 706 may be configured with a separate light emitting unit 707 comprising the light source, where the light emitting unit 707 is connected or connectable with the generator 100.
  • the light source is integrated with the generator in a common housing and the bicycle light is configured so that at least a part of the light from the light source will illuminate a wheel component of the wheel 702, e.g. a wheel component such as the rim 703, a tire, or the brake disc 720.
  • the illumination of the wheel component may provide characteristic light effects and additional visibility of the cyclist and, thereby, improved safety.
  • the bicycle light comprises an UV light source configured to illuminate a wheel component.
  • the wheel component may be coated or painted with UV reflective painting to further improve the visibility.
  • the rotatable magnet part 102 may be disc shaped and have a diameter in the range from 5 mm to 40 mm. Magnet parts with small diameters in the range from 5 to 10 mm are preferred for the brake shoe 800. In general it may be preferred to use two or more rotatable magnet parts with relatively small diameters instead of a single rotatable magnet part with a larger diameter in order to optimize the nominal electrical power production capability of the generator 100 relative to the mass of permanent magnets used for the magnet part 102, 402, 403, 512, 601, 602.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP20130182031 2012-08-28 2013-08-28 Générateur de courant de Foucault pour bicyclettes Withdrawn EP2703264A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20130182031 EP2703264A1 (fr) 2012-08-28 2013-08-28 Générateur de courant de Foucault pour bicyclettes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12182032 2012-08-28
EP20130182031 EP2703264A1 (fr) 2012-08-28 2013-08-28 Générateur de courant de Foucault pour bicyclettes

Publications (1)

Publication Number Publication Date
EP2703264A1 true EP2703264A1 (fr) 2014-03-05

Family

ID=46939524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20130182031 Withdrawn EP2703264A1 (fr) 2012-08-28 2013-08-28 Générateur de courant de Foucault pour bicyclettes

Country Status (3)

Country Link
US (1) US20140070675A1 (fr)
EP (1) EP2703264A1 (fr)
DE (1) DE202013011949U1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015166100A3 (fr) * 2014-05-02 2016-01-28 Aktiebolaget Skf Ensemble roulement à générateur intégré
WO2016060585A1 (fr) * 2014-10-15 2016-04-21 Николай Владимирович ОРЛОВСКИЙ Véhicule de transport
GB2531751A (en) * 2014-10-29 2016-05-04 Skf Ab Bearing assembly with integrated generator
WO2019101360A1 (fr) * 2017-11-25 2019-05-31 Dirk Strothmann Système d'un ou de plusieurs générateurs de courant de foucault sans contact sur des contre-éléments électriquement conducteurs présentant un agencement les uns par rapport aux autres optimisé en matière de puissance, et applications associées sur des véhicules, en particulier sur des bicyclettes
EP3309942A4 (fr) * 2015-06-10 2019-06-26 Nabtesco Corporation Générateur de puissance sans contact

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6639810B2 (ja) * 2015-06-10 2020-02-05 ナブテスコ株式会社 回転電機および非接触発電機
CN107154668B (zh) * 2016-03-04 2024-02-13 深圳市芯睿康光电科技有限公司 内涡电无接触自行车发电机
CN106341030A (zh) * 2016-09-06 2017-01-18 东南大学 一种非接触型永磁式运动能量收集装置
EP3553532B1 (fr) * 2016-12-09 2023-07-05 Nabtesco Corporation Dispositif de détection de vitesse
DE102018212804A1 (de) * 2018-08-01 2020-02-06 Robert Bosch Gmbh Verfahren zur gezielten Änderung und/oder Ausrichtung eines Radlenkwinkels
BR112022017389A2 (pt) * 2020-03-02 2022-10-18 Falcon Power Llc Máquina elétrica de geração de torque variável empregando arranjo de ímã halbach sintonizável
US12003146B2 (en) 2020-03-02 2024-06-04 Falcon Power, LLC Cascade MosFet design for variable torque generator/motor gear switching

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033700A1 (fr) 1999-11-02 2001-05-10 Relight Dispositif de production d'electricite pour vehicule
US6310416B1 (en) * 2000-02-11 2001-10-30 Huang-Tung Chang Resisting and pulling mechanism
EP2178738A1 (fr) 2007-07-30 2010-04-28 Reelight APS Générateur pour bicyclette

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03276893A (ja) * 1990-03-27 1991-12-09 Nippon Carbureter Co Ltd 自転車の制動灯装置
US9056643B2 (en) * 2009-06-15 2015-06-16 Reelight Aps Induction generator for a bi-cycle
EP2323242A1 (fr) * 2009-11-13 2011-05-18 ABUS August Bremicker Söhne KG Générateur pour roue de bicyclette
TWI443258B (zh) * 2011-10-12 2014-07-01 Ind Tech Res Inst 旋轉動能輸出裝置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033700A1 (fr) 1999-11-02 2001-05-10 Relight Dispositif de production d'electricite pour vehicule
US6310416B1 (en) * 2000-02-11 2001-10-30 Huang-Tung Chang Resisting and pulling mechanism
EP2178738A1 (fr) 2007-07-30 2010-04-28 Reelight APS Générateur pour bicyclette

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BEN COXWORTH: "MAGNIC LIGHT CLAIMS NEW FORM OF NO-CONTACT BICYCLE DYNAMO LIGHTING", GIZMAG.COM, 16 February 2012 (2012-02-16), pages 1 - 9, XP003035180, Retrieved from the Internet <URL:HTTP://WWW.GIZMAG.COM/MAGNIC-LIGHT-CONTACTLESS-DYNAMO/21494/>
DIRK STROTHMANN: "MAGNIC LIGHT: GET NEW ENERGY!", KICKSTARTER.COM, 19 March 2012 (2012-03-19), pages 1 - 8, XP003035179, Retrieved from the Internet <URL:HTTPS://WWW.KICKSTARTER.COM/PROJECTS/DYNAMODIRK/MAGNIC-LIGHT-GET-NEW-ENERGY>
HERBERT KRABEL: "A LOOK AT MAGNIC LIGHT", SLOWTWITCH.COM, 27 February 2012 (2012-02-27), pages 1 - 2, XP003035181, Retrieved from the Internet <URL:HTTP://WWW.SLOWTWITCH.COM/PRODUCTS/A_LOOK_AT_MAGNIC_LIGHT__2599.HTML>

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015166100A3 (fr) * 2014-05-02 2016-01-28 Aktiebolaget Skf Ensemble roulement à générateur intégré
WO2016060585A1 (fr) * 2014-10-15 2016-04-21 Николай Владимирович ОРЛОВСКИЙ Véhicule de transport
RU2600557C2 (ru) * 2014-10-15 2016-10-20 Николай Владимирович Орловский Способ передвижения и транспортное средство для реализации способа (варианты)
GB2531751A (en) * 2014-10-29 2016-05-04 Skf Ab Bearing assembly with integrated generator
EP3309942A4 (fr) * 2015-06-10 2019-06-26 Nabtesco Corporation Générateur de puissance sans contact
WO2019101360A1 (fr) * 2017-11-25 2019-05-31 Dirk Strothmann Système d'un ou de plusieurs générateurs de courant de foucault sans contact sur des contre-éléments électriquement conducteurs présentant un agencement les uns par rapport aux autres optimisé en matière de puissance, et applications associées sur des véhicules, en particulier sur des bicyclettes
US11716007B2 (en) * 2017-11-25 2023-08-01 Dirk Strothmann System of one or multiple contactless eddy current generators on conductive counter elements in a performance-optimised arrangement relative to one another, and uses thereof in

Also Published As

Publication number Publication date
DE202013011949U1 (de) 2014-11-27
US20140070675A1 (en) 2014-03-13

Similar Documents

Publication Publication Date Title
EP2703264A1 (fr) Générateur de courant de Foucault pour bicyclettes
JP5984025B2 (ja) 非接触自転車発電機、車両照明システムおよび自転車
EP2178738B1 (fr) Generateur pour bicyclette
WO2001033700A1 (fr) Dispositif de production d&#39;electricite pour vehicule
EP2443024B1 (fr) Générateur inductif pour bicyclette
EP2713483A2 (fr) Générateur sans contact, son composant et son application
EP2323242A1 (fr) Générateur pour roue de bicyclette
TW201633667A (zh) 自行車用發電機及可在其拆裝的電池模組
US20050280322A1 (en) Induction generator for a rotatable object
EP2272742B1 (fr) Générateur à contrôle électronique pour un véhicule du type bicyclette
EP2121421B1 (fr) Générateur en deux parties pour véhicules
JP3140089U (ja) 車両用照明装置
JP6089191B2 (ja) 発電装置
JP2018191417A (ja) 振動ダイナモ発電装置
DK201400132U3 (en) Hvirvelstrømsgenerator til cykler
JP2007143210A (ja) モータ装置及びレンズ駆動装置
US20170267302A1 (en) Bicycle lighting systems and methods
US20110127887A1 (en) Generator for a bicycle
KR200341996Y1 (ko) 무게중심추를 이용한 소형발전기 및 그를 구비한 발광체
KR100947882B1 (ko) 자전거용 발광장치
KR20140036472A (ko) 자가발전 기능을 갖춘 구름휠
TW201530985A (zh) 健身車飛輪發電裝置
KR20120033737A (ko) 자전거 발전 시스템
EP1653590A1 (fr) Génératrice à induction pour des objets rotatifs
KR20100119704A (ko) 디스크 브레이크 발전기

Legal Events

Date Code Title Description
AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

TPAC Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

TPAC Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

17P Request for examination filed

Effective date: 20140904

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20141020

TPAC Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

TPAC Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

TPAC Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

INTG Intention to grant announced

Effective date: 20160226

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160708